Quantitative analysis method for oil-containing abundance of nuclear magnetic resonance rock in petroleum well drilling

A rock oil-bearing and nuclear magnetic resonance technology is applied in the field of rock oil-bearing abundance analysis in oil drilling, which can solve the problems of inaccurate and reliable measurement data, discontinuous oil-bearing abundance parameters, and difficulty in meeting production needs, and break through technical bottlenecks , representative and reproducible effect

Active Publication Date: 2009-02-18
中石化石油工程技术服务有限公司 +3
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

There are two traditional methods for obtaining oil abundance in petroleum drilling geology: (1) Laboratory analysis method: this method collects drilling core samples for analysis, and can obtain more accurate oil abundance parameters, but due to the lack of core sections for drilling , so the obtained oil abundance parameters are also discontinuous and limited; in addition, due to the long cycle of laboratory analysis, it is difficult to meet the production needs
(2) Geophysical logging interpretation method: This method uses geophysical logging (such as acoustic waves, neutrons, density, resistivity, etc.) data a

Method used

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  • Quantitative analysis method for oil-containing abundance of nuclear magnetic resonance rock in petroleum well drilling
  • Quantitative analysis method for oil-containing abundance of nuclear magnetic resonance rock in petroleum well drilling
  • Quantitative analysis method for oil-containing abundance of nuclear magnetic resonance rock in petroleum well drilling

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example 1

[0033] Example 1: NMR analysis while drilling of well ZJ5-10 in the Yanchang Formation of the Triassic in the southern Ordos Basin

[0034] The method for analyzing rock oil abundance using nuclear magnetic resonance technology in the present invention includes the calibration of nuclear magnetic resonance analysis instruments, the preparation of rock oil abundance working curves, the nuclear magnetic resonance analysis of cuttings samples and the calculation of rock oil abundance parameters. Specific steps are as follows:

[0035] (1) Debugging and calibration of NMR analysis instruments

[0036] 1. Selection of analytical instruments

[0037]Using UNIQ PMR pulse nuclear magnetic resonance analyzer, version 3.0 software. This instrument is one of the most advanced nuclear magnetic resonance analysis instruments used in the petroleum field in China. The instrument is stable, the calibration linearity is high, and it has the tail peak processing function.

[0038] 2. Instru...

example 2

[0075] Example 2: NMR analysis while drilling of Well HH24 in the Yanchang Formation of the Triassic in the southern Ordos Basin

[0076] Table 3 shows the NMR rock oil abundance analysis data of Well HH24 in the southern Ordos Basin while drilling. The "sample depth" in the table is the depth of the rock (cuttings or core) samples collected along with the drilling depth during the drilling construction; analysis conditions); "oil abundance (weight %)" is the rock oil abundance data calculated according to formula (1).

[0077] Figure 4 It is the result map of the comprehensive analysis of Well HH24, and Fig. 5 is the enlarged view of the 1788-1808m section of the well. from Figure 4 The comparison of various results in the above shows that in the 1678-1700 m well section of the Chang 6 oil layer group, the gas logging and mud logging have an abnormal display of total hydrocarbon value, and the logging also shows that there are multiple layers with a certain oil abundance...

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Abstract

The invention relates to a fine well-drilling cuttings oil-abundance analysis method based on nuclear magnetic resonance technology. The method includes the following steps: debugging and calibrating a nuclear magnetic resonance analytical apparatus; making up a rock oil-abundance working curve at target horizon, getting rock cuttings at a reservoir layer without oil gas at the target horizon within the work area and preparing the rock cuttings into a sample mixture of crude oil and cuttings; soaking the sample mixture in water-soluble paramagnetic ion solution; conducting nuclear magnetic resonance analysis; with the intensity of nuclear magnetic resonance signals as the abscissa and the content of crude oil in the sample as the ordinate, drawing a rock oil-abundance working curve of the target horizon; and then calculating the rock oil-abundance data. The method can analyze well-drilling cuttings real-timely, work out the rock oil-abundance data real-timely and carry out quantitative evaluation to the oil-abundance of the reservoir layer, providing real-time technical support to oil exploration, development and production.

Description

1. Technical field [0001] The invention relates to a method for analyzing the oil abundance of rocks in oil drilling, in particular to an analysis method for the oil abundance of fine drilling cuttings by using nuclear magnetic resonance technology. 2. Background technology [0002] Oil and gas reservoirs are the basic units of oil and gas accumulation on the earth's crust. The research on geological conditions for oil and gas reservoir formation mainly includes oil source layers (source rocks), oil and gas generation, oil and gas migration, reservoirs, cap rocks, traps, and preservation conditions. Among them, the research on reservoir is the core content of oil and gas reservoir research, and oil abundance is an important parameter for evaluating reservoir properties and calculating oil resources. [0003] Oil abundance refers to the weight (or volume) of crude oil contained in rock per unit weight (or volume), and the percentage (weight% or volume%) is often used to expre...

Claims

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Application Information

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IPC IPC(8): E21B49/00G01N24/08
Inventor 陈英毅何国贤王飞龙张晋元周天顺周小勇陈乐龙
Owner 中石化石油工程技术服务有限公司
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